Door latch



May 31, 1927.

P. FRANTZ noon LATCH Filed Aug. 28, 1925 2 STIeetS-Sheet 1 li-zaemm 2& 1%

May '31, 1927. 79 P. FRANTZ DOOR' LATCH Filed Aug. 28. 1925 ZSheets-Sheet 2 7 II VIII/III IIIIIIIIA 'IIIII/ IIIIIIIIIIIIII" v Li;

Patented May 31," i

PETER FRANTZ; F mamm- ILLINOIS, AssjIGNonmornAnTz 'mnnnmernnjrndf 00., or STERLING, ILLINoIs, poRPoRA'rIonoF 'InnIi'IoIs' Y noon. :LATCH;

Application inea Au st 128,: 1925'. -Seria1 No.;53,010.

This invention'relates to door latches, and; more particularlyjto those ordinarily known ployed, one at each side of the door, so that the door canube unlatched from either side I thereof, andlhaving means whereby th'eftwo thumb pieces a're incorporated 1n a struce l5 do0r, preferably by merely boring;{ a-hole,

therein, as will hereinafter morefi llyfap pear.

I It is an: object to provide certain.de-

tails and features of' construction and comi-j zci binations tending to increase-the general ef ficiencv and desirability of a double thumb latch involving theprinciples of the, inve piece door latch construction ofthis particf,

tion, showing the adjacent portions of door and the doorfr'ame. '1 v Figure 2 is adetail horizontalsection on line- 2-2 in Figure 1. g V v v Figure 3 is an enlarged plan view of one 35,,0f the thumb pieces. p 3 Figure 4 is a side elevation ofls aid'thumb p c s-V. s. i a

Figure 5 is a plan VIGW'Of theblank from which the mounting of the two'thu nb pieces is made.

Figure 6'is-a side elevation of said mounting, after the blank is bent into shape;

Figure? is an enlarged vertical section on line 7V-7 in Figure Figure 8' is, a similar view showing the parts in a different position.

inFigure 7.; I t

Figure 10 is a plan view of the other thumb piece;

Figure 11 is aside elevation of the thumb piece shown in Figure 10. 3

Figure 12 is a perspective of another part of the mechanism.v

i As thus illustrated, the invention complate to, permit up closedposition; I

prises theplates 2, a provided with handles 3, and which are secured by screws- {1 to theiopposite sides-df'=-the.door;;

At oneside of the door there isfa bracket-s P1608 5 secured in'place' by'screws-fi, and 0:

upon thisbracke't'the latch bar 7 is 'pivotally; i

and the endi-p'ortion of thelatfch fbar 7is ar-i{' u ranged in position to engagethe strike piece; 9', which is, ordinarilyv fastened to the door I frame-,in the usual and well known marm'er, tural unit which can be easily insertedinlthe -fih l he latch'jban will rise and then fall finto, locking-engagementwith said "strike 1 1v piece, and therebyhol'd thedoor 'inlclosed position. -The' latch bar 7 also ex'tends'r 7 through a plate 10, fastenedwtotheedgeofvl, I i theudoor, asshowmltheifeibeing a slot inthis I v anddown movement. of 175; V

the latch; bar, and this plate and the strike; piece have coinciding holesthereirr, so that them wheniit isdesired to. lock thedoorin a padlock can'beg inserted through both'of The mounting; for v ..made from theblank shown in; Figure 5,};-

and is bent into. shape, as shown in Figure 16, 'sothat-it is tubular 'or'eylindricalin shape; -1 .v

The downwardly, bent portionslr arepro-1 '1Q vided withapivot 12 upon which ismounted thelifting piece 13 of the mcch anismrandthe P Il -i116: tu l m n mg are I serted through slots in the plate- 2 and are-:- 1 then ;riveted over to hold the tubular mounts;

ing in" place;

a The --thumb piece 15 extends through} opening: 16 in the plate 1,: and- -hasl earsf17j;

Which extend downwardly; :insideof said-*5 plate, whereby the lugs 18 of saidthumbf 1 piece will bear against the outer surface of,

.the plate' 'hand the thumb piece willbe-ful crumed upon thelower edgeof the. opening; j'16in said plate; c I, i, v The other thumbfpiecel19 has an opening fl q'f a,

v 2O,therein,1and ;.has doWnWardlybent par- Figure 9 is a detail section on line'9 9 allelportions 21, between hichfthe inner? end portion 22,of;the other thumb Pieceisif disposed, The edges 23 of the vportion 21 bear against the inner surface of; theplate; 2 ,5 0 while the outside lugs 24 of the thumb piece 19 bear against the outer side of said. plate,

cofw U1 1" plate 2, previously piece 13rests upon the inner end portion of the thumb piece 19, assh'own, an'd'when this 'thumbj piece .is depressed the liftingpiece' WVhen the I thumb piece ,is depressed, its inner end portion" willirise through-the opening 2 5 and raise the lifting piece l3'a'nd thus raise the latch H g 7 '"piecefor'oue side of the door,va thumb, piecef" bore a hole in the door 27, a'sfshow n, andf; then toinsert the more or lesstubular'sheet metal-member'28, which latter forms the 'mounting, havlng'the portions 11 and 14,- 15: I assembled in the manner shown, and" d mentioned; if11 e11if'tin will raise the latch bar.

In use, therefore, it is onlynecessary to previouslymentioned. The other; parts are scribed,'and the latch bar 7 can be raisedo 1,

of engagement with the strike-piece'f9 when it'isdesired-to openthe door, byirneans of i either thumb upiece 15101 1 9, -i n the' manner f shown and described The working; parts are all' enclose'd'by themember 28, prac't'i- Cally, as shown, within the thickness iof the door, except the latch- 'b'ar "7 ija-nd the "outer ends of the thu nbpieces, as well as 'the outer endiof .therlifting' piece 13,"whereby,the only alteration the doo'rllis the boring ofthe .11616 26, as/ previouslyexplained; a

r J, The-gap 29 Zfor'ni'diin thef upper side-of sow .the glifting piece 13 t" rise suih'ciently, 21-3 the memberf28, at' 'one; end: thereof, permits.

shown in Figure 8-, to-lift the latch bar I out of engagement with'the strike piece 9," in the."-

7 desired manner. L'Fhe ap between'the-lower' edges 30 of the member 28'provides clearance for the 'inneiendpQrtiOnQQ iof th thumb iece'15, as shown,

'Withi the 1 construction sheen and "at scribed, it will be seen that; the latch-mecha- 'nism can be applied to doors of' different.

. areiautomatically relatively adjustable,

' adjustment. In, this a'y,1th 'e lat'ch me'cha nism'can" be applied to doors ofdifierent parts thereof, inasmuchas the two'plates l and2 are simplyapplied to a door, of an a particular thickness, andthe housing 28 ing to speak, for doors" of diiferent thicknesses,-

inasmuchflas the latching portionsofthe:

two' thumb pieces provide for such" relative thicknesses with'out anyj'jchanging of the j 'serted' as shown, and any difference in'zthe words, the thumb piece 19 will depending upon the thickness ofjthe door,

and thus'the two thumb pieces are, asstated, automatically relati rely adjustable, and in a mannerl'adjust'themeselves to the thickness oted lifting piece for raising sa'id bar, thebar i and lifting piece havingthesame relation for 1 doors ofediifei'ent thicknesses, a thumb ffor the other side ofithedoor,'onejthun1b: iece extending overthe" other below' said liftiiigf piece, and means' to fulcrum zindfsupeceIhas thefulcrum point thereon for doors of differentthicknesses, whereby depression of eitherthumb piece will cause said lifting] piece to raisethe latch bar. j V

"A structure as specified in claim .1, comfl j a mount'mg, upon wli1clrsa1,d liftlng' V oug'h the door and' form iiig 'afhous-I e ort' each th'umb piece, so that :each thuinb iivoted', said mounting being-,1 inl for aidlifting piece and. the innehend e-eir. 1

whi l 't slioyiiriFanddejscribed.

i said thumbfpieces, within which qhe" lifting piece; and the in er" ons of thezthumb pieces {are free 3;'A :structure as specifiedin.claimf1,; 6116:; i th bp we' h v n a p nihg o h eia 'j'ac'entj end portion .of: the other i thumpiece is free'to rise, substantially as prising an outer plate securedftoxeach side of: the door toprovide-fulerums forthe two ,j thumb pieces, with a sloti'iuone plate for 1,4. Y structure as speeifiea iicia m am;

p' mating saidj lifting piece to jraise the f ch bar," each plate foujt of engagement with'said fulcrums; i

.. t V v n a i d u c i E ton itsj allottedithumb pi e'ce, bothfplates Y e g"frenioyable without remoyingv said lift} I inipiece, and" han'dles'the upper endsof thicknesses, and; that thetwothumb pieces "5. A structure as specifiedlin claim 1,1'qo1h-" jprisin'gi a' sheet metal housing"; inserted throughtthe .door 'to enclose 1 said lifting piece and [the inner ends Toff said V- tliumb V V r pieces, and an outer plate secured to one-end 0f saidfhousin'g.

prisingiplates secured at opposite sides '{of '6. structure as sttefiea ihem lgeoathe door, providing fulcrumsfor, the tyiro thumb pieces, "so that the thumb pieces are automatically relatively adjustable for doors 1 of different thiclmesses,'smeans between and 7 independent of said plates for pivotallysupporting said lifting piece, and'handlesseparate from said fulcruins' Specification signedthis 18 day of n I P TER FR T'ZQ i 

